Flight Controls

Question 1

Describe the flight controls

Answer 1

All controls are hydraulically boosted to

• reduce pilot effort and to
• counteract control feedback forces

Question 2

Describe the cyclic boosting

Answer 2

Fore/aft inputs to push/pull tubes to servo actuator to bellcranks and push/pull tubes to tilt the swashplate non-rotating ring

Fed through cam assembly - adds 12% of total movement

• aids in maintaining linear movements and compensating for transverse flow effect
• Force Gradient Cartridge permits cyclic movement if cam assembly becomes jammed

Question 3

Describe the cam assembly

Answer 3

Adds 12% of total cyclic movement

• aids in maintaining linear cyclic movements, helps in compensating for transverse flow effect
• force gradient cartridge permits cyclic movement if cam assembly becomes jammed

Question 4

CYC CTR CAS

Answer 4

Cyclic centering switch attached to cyclic stick bellcrank

• located under pilot set
• energized when WOG

Means cyclic is not centered - requires pilot input to center

Question 5

Describe collective boost

Answer 5

Connected to servo actuator via push/pull tubes

Adjusts swashplate ball/sleeve assembly and cyclic levers changing MR blade angle without affecting cyclic path

Question 6

What does TR boost include?

Answer 6

Pedals
Pedal stop assembly
Pedal adjustor
Control tubes
Bell cranks
Hydraulic actuator
Pitch control mechanism on TR gearbox shaft

Question 7

Describe the pitch control mechanism of the TR gearbox shaft

Answer 7

Bellcrank and rod assembly actuates control tube through hollow drive shaft to cross head and pitch links

Question 8

What are the three primary components of the pedal restrictor control system?

Answer 8

Airspeed actuated pedal stop system includes:

• Rotary solenoid
• Micro-switch
• Test button

Question 9

Pedal restrictor control system operation

Answer 9

1. GDC 74H calculates ASI from inputs and sends GIA 2
2. ASI > 55 +/-5 KIAS, GIA 2 drives solenoid
   - solenoid rotates mechanical restrictor limiting left pedal travel
3. ASI < 55 +/- KIAS, GIA 2 de-energizes solenoid
   - left pedal returns to normal full range

Question 10

Pedal Stop CAS

Answer 10

System has detected failure in pedal stop system

1. Vne 60 KIAS
2. Pedal stop emergency release - PULL
3. Land as soon as Practical

During total electrical failure (Batt & Gen) solenoid is Fail safe to the Disengaged positon
- Restrictor is retracted and full left pedal travel is available